/Engine/Source/Runtime/Core/Public/GenericPlatform/GenericPlatformProcess.h
Creates a new process and its primary thread. The new process runs the specified executable file in the security context of the calling process.
The process handle for use in other process functions
static [FProcHandle](API\Runtime\Core\Unix\FProcHandle) CreateProc ( const TCHAR * URL, const TCHAR * Parms, bool bLaunchDetached, bool bLaunchHidden, bool bLaunchReallyHidden, uint32 * OutProcessID, int32 PriorityModifier, const TCHAR * OptionalWorkingDirectory, void * PipeWriteChild, void * PipeReadChild )